Method of re-enforcing mantles of refractory incandescing earths



. VON' WELSBACH.

(No Model.)

VISLUJIHOD O F RBINFURCING MANTLBS 0F REFRAGTORY INGANDESGING EARTHS.

WM Z y ww Jr u M l a UNiTnn STATES PATENT Trice.,

CARL AUER VON V'EIJSBACII, OF VIENNA, AUSTRIA-HUN GARY, ASSIGNOR ',lO 'lIlE VELSBAUII INCANDESCENT GAS IiIGlI'l COMIAN Y, O11" J ERSEY (l'l`Y,

NElV JERSEY.

METHOD F RE-ENFORCING MANTLES 0F REFRACTORY INCANDESCING EARTHS.

SPECIFICATION forming part of Letters Patent No. 396,347, dated January 15, 1889.

Application led March 31, 1888.

T0 all whom, t obey concern:

Be it known that I, t im, licita VoN WELs- BACH, a subject of the Emperor ol Austria, re-

siding at Vienna, Austria-Ilungary, have invented new and useful Improvements in the Method of Re-enforcingMantles of Refractory Incandescing Eart-hs for Attachment ot Suspcnding-NVires, of which the following is a speciiicatien.

'lhe object of my invention is to strengthen and re-enforce that portion of an incandescing mantle or hood through which is passed the platinum wire used l'or attaching the mantle tov its support.` In the lVelsbaeh incandcscing gas-light system a mantle or hood composed oll refractory earth is usually suspended over a gas-burner by means o plat-inum wire passed through the uppdr end oi" a supportiiig-rod. The mantle lor hood is `made 2o by saturating a textilel :abric with a solution of the salts of refractory earths capable olf giving light by incandeseence, the textile material being subsequently burned away, so that the mantle when ready for use consists oi' a net-work of earthy substance, which -is `fragile and liable to be torn or broken at the point where the platinum wire is inserted. I have l'ound that this dillici'llty can be obviated by applying to the upper end of the 3o mantle a strengthening or re-entorcing jiluid composed ol` a solution ol magnesium and aluminum salts, which will strengthen and re-en'oree that part ot' the mantle to which the platinum wire is attached and prevent 3 5 the wire from tearing thc fragile structure.

The annexed drawing shows a View of a mantle treated according to my present invention, the re-enlorced or strengthened portion Abeing indicated by shading.

In carrying` my invention into ellt'ect I ,pi efer to use a solution ot' magi'icsium nitrate and aluminum nitrate in water, no particular proportions being necessa-ry, though Ipreli`er an excess et the magnesium salt. lhe upper or attaching end of the mantle is dipped into the strengthening-iiuid, which has the effect of hardening the mantle, so that it will `resist any tendency to strain incurred.bythe insel'- tion oi.' the platinum wire. ly thus strength- Serial No. 269,201. (No model.)

ening the mantle and lessening the liability 5o ot breakage it is obvious that considerable economy in the manntactnle and use of these vfragile articles will be eili'ected.

'lhe 'lollowing-named solution gives very good results when used as a strengtheningor re-entorcing application in the mannen-above described: live parts magnesium nitrate, onefourth part aluminum nitrate, and ten parts water, It will be understood, however, that I do not confine myself to these prol'iortions 6o nor to a [luid containing only the bodies above named, as other salts ol" n'.agii.esium and aluminum may be used either alone or in. cnnbination with bodies yhereinafter named.

Some olil the following-nanied bodies have 65 little importance as incandescent bodies b v theniselves; but as in combination they emit a plentiful. light and readily vitril'y, they may be employed with advantage vfor causing the mantle to adhere to its suspemling-wire. 47o Amongthesc bodies maybe mentioned beryllium oxide with thorinum oxide or zirconium oxide and the combination oli' those bodies with alumina, niagnesia, or lime. Also, niobates olil the refractory earths may be combined for this purpose with magnesia or alumina, beryllium oxide, calcium oxide, or cerium oxide, In the same manner as the niobates may also be used the tantalaies ol cerium, lanthanum, yttrium, or zirconium, So with or without magnesia. 'lhe silicates, titanates, and phosphates o'l' the refractory earl-hs may also be used, and the several bodies named may be combined with each other in. various proportions.

It" desireththe upper end oli the mantle can. be subjected to the heat ol a gz'ts-lame subscqnent to the application oli' the strengtheningilu id, so as to convert the salts contained in said fluid into earthy oxides prior to shipment 9o ot' the mantle; or such heating can 4bc del'erred until the mantle is placed over a gasbnrner For use, when the salts will become decomposed and converted in a few minutes into light-emitting oxides.

In the annexed drawing, A designates the mai itl e; e, its upper re-en'forcml portion, which has been strengthened by the application ol' the described fluid, and B the platinum suspending-wire passed through said re-enforced or strengthened portion of the mantle.

What I claim as my invention is I. The method of strengthening or re-en forcing mantles or hoods of refractory incandescing' material at the point where a suspendlngavire is inserted, which consists in applying,T to that part of the mantle or hood a strengthenng-'lluid of the salts of refractory earths in solution, substantially as described.

i?, lhe method of Strengthening' or re-enforcing; mantles or hoods of refractory incandeseing; earth at the point where a suspending-wire is attael'led, which consists in applying to that part of the mantle or hood a solution of maftgnesium nitrate and aluminum nitrate, substantially as described.

In testimony whereof I affix my signatn re in presence of two witnesses.

(EARL AUER VON VEIiSBAC/ll. lVitn esses:

10i-nin WILLIAMS, ICDMUND .TUSSEN 

